Low Vacuum..??
#1
Full Member
Thread Starter
Join Date: Aug 2003
Location: Sydney, Australia
Posts: 242
Likes: 0
Received 0 Likes
on
0 Posts
Low Vacuum..??
Just some quick noob questions...
What causes low vacuum readings?
Would bad compression also cause vacuum to drop with it?
Would vacuum leaks cause low vacuum?
What vacuum should stock ports be on?
Joseph
What causes low vacuum readings?
Would bad compression also cause vacuum to drop with it?
Would vacuum leaks cause low vacuum?
What vacuum should stock ports be on?
Joseph
#2
Full Member
Join Date: Aug 2001
Location: Columbia,SC
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
What causes low vacuum readings?
You probably have a vacuum leak either a hose has popped off or you may have a cracked hose. If not, it could be a number of things such as faulty actuators, cracked vacuum chamber, etc.
Would bad compression also cause vacuum to drop with it?
IF you are talking about low rotor compression then my first question is how low? Below 85psi on all three sides? Is so, you need a new engine then trouble shoot vacuum leak. Now having said that, a low vacuum reading will not affect your rotor/engine compression.
Would vacuum leaks cause low vacuum?
YES
What vacuum should stock ports be on?
If you are talking about ports that you connect your vacuum hoses to then there are LOTS... you need to search under 3rd gen FAQ for a vacuum diagram. It's pretty complex but knowledge and understanding is a must if you own an FD.
J
You probably have a vacuum leak either a hose has popped off or you may have a cracked hose. If not, it could be a number of things such as faulty actuators, cracked vacuum chamber, etc.
Would bad compression also cause vacuum to drop with it?
IF you are talking about low rotor compression then my first question is how low? Below 85psi on all three sides? Is so, you need a new engine then trouble shoot vacuum leak. Now having said that, a low vacuum reading will not affect your rotor/engine compression.
Would vacuum leaks cause low vacuum?
YES
What vacuum should stock ports be on?
If you are talking about ports that you connect your vacuum hoses to then there are LOTS... you need to search under 3rd gen FAQ for a vacuum diagram. It's pretty complex but knowledge and understanding is a must if you own an FD.
J
#3
Moderator
iTrader: (7)
Originally Posted by Ripzta
Just some quick noob questions...
What causes low vacuum readings?
Would bad compression also cause vacuum to drop with it?
Would vacuum leaks cause low vacuum?
What causes low vacuum readings?
Would bad compression also cause vacuum to drop with it?
Would vacuum leaks cause low vacuum?
Compression also changes a little depending on if the engine is cold (higher comp. readings) or hot (lower compression readings). Like RPM, the engine temp can affect compression and vacuum by several percent.
What vacuum should stock ports be on?
Joseph
Joseph
Dave
Thread
Thread Starter
Forum
Replies
Last Post
Turblown
Vendor Classifieds
12
10-17-20 03:25 PM